[Marblehead]

The EGR system has been known to cause failure in the #6 cylinder on the MKIV, of course the 2JZ-GTE operates at a much higher temp. than the 5M. It is, however, a possibility that the hot gasses, over time, could cause excessive heat wear to one or two cylinders of any engine. Blocking the EGR will simply eliminate the intrusion of spent gasses into the clean air and drop the operating temps, though it's so minimal that you'll never notice. Just something to make the engine a little more happy and content.

Got my toes in my hand, got a drink in the sand.
Scott